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    <title>Simultaneous perception tests</title>
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    <h2>Simultaneous perception tests</h2>
        <p>
            Simultaneous perception is first step of binocular vision.
            It's ability to simultaneous perception two images placed on each eye's retina.
        </p>
        <p>
            To check simultaneous perception different images are presented for left and right eye.
            If patient can't see one of them or perceive them alternately, he/she don't have ability to simultaneous perception.
        </p>
        <p>
            Program includes 5 test checking simultaneous perception.
            They consists of 2 elements presented for different eyes:
                <ul>
                    <li>cage and lion,</li>
                    <li>kennel and dog,</li>
                    <li>bicycle's wheel and hub,</li>
                    <li>two top-connected triangles,</li>
                    <li>garage and car.</li>
                </ul>
        </p>

        <p>
            Exemplary on picture 1 there is element visible for one eye and on picture 2 - visible for second eye.
            Pacient with ability to simultaneous perception should perceive image similar to image 3.
        </p>

        <p>
            Patient can correct his phoria by moving one of elements in whichever direction.
            <ul>
                <li>up by pressing key &uarr;</li>
                <li>down by pressing key &darr;</li>
                <li>left by pressing key &larr;</li>
                <li>right by pressing key &rarr;</li>
            </ul>
        </p>

        <p>
            Phoria is calculated from following equation on the basics of movement suitable element <i>x</i> and distance from monitor <i>l</i>.
            <center>
                <img src="../../images/eqnPhoria.png" />
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        </p>

         <br><br><br>
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            <img src="../../images/testSimPercA.png" />
            <br/>
            <i>Image 1. Simultaneous perception tests - image for first eye</i>
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        <br><br><br>
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            <img src="../../images/testSimPercB.png" />
            <br/>
            <i>Image 2. Simultaneous perception tests - image for second eye</i>
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        <br><br><br>
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            <img src="../../images/testSimPercC.png" />
            <br/>
            <i>Image 3. Simultaneous perception tests - binocular vision image</i>
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